"The Enfield had a better sight, but troops commonly knocked it off and sighted along the barrel."
Do you have ANY written resource to back up that statement? That is something I have NEVER heard of any troops doing with an 1853 Rifled Musket, imported from England.
I agree with the sights being better on an Enfield, than a Springfield, but never heard of troops on either side knocking them off for any reason.
Respectfully:

Kevin Dally